Electromechanical Devices

Magnetic circuits

Lecture 4

Reluctance

Example 4.1

Example 4.2

Example 4.2

Composite series magnetic circuits

For a series magnetic circuit having n parts, the total reluctance S is

given by:

S = S1 + S2 + ... + Sn

Composite series magnetic circuits

Example for a series magnetic circuit having two different materials

A and B

The total reluctance S is given by:

S = SA + SB

Example 4.3

Example 4.3

Example 4.4

Example 4.4

Comparison between electrical and magnetic quantities